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87040-40-2

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87040-40-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87040-40-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,0,4 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 87040-40:
(7*8)+(6*7)+(5*0)+(4*4)+(3*0)+(2*4)+(1*0)=122
122 % 10 = 2
So 87040-40-2 is a valid CAS Registry Number.

87040-40-2Relevant articles and documents

Enantioselective and Diastereoselective Construction of Chiral Amino Alcohols by Iridium-f-Amphox-Catalyzed Asymmetric Hydrogenation via Dynamic Kinetic Resolution

Wu, Weilong,You, Cai,Yin, Congcong,Liu, Yuanhua,Dong, Xiu-Qin,Zhang, Xumu

, p. 2548 - 2551 (2017/05/24)

The iridium-f-amphox-catalyzed asymmetric hydrogenation of racemic α-amino β-unfunctionalized ketones proceeds via a DKR (dynamic kinetic resolution) process for the construction of various chiral N,N-disubstituted α-amino β-unfunctionalized alcohols in quantitative yields with excellent enantioselectivities and diastereoselectivities (all products >99% ee and >99:1 dr, TON up to 100 000). Importantly, this catalytic asymmetric hydrogenation with a DKR process provided a highly efficient and powerful synthetic strategy for the preparation of key chiral intermediates of the preclinical antitumor agent (S,S)-R116010.

1,2-Aminothioethers Derived from Ephedrine and Pseudoephedrine: Heterobidentate Ligands for the Palladium-Catalysed Asymmetric Allylic Substitution Reaction

Page, Philip C. Bulman,Heaney, Harry,Reignier, Serge,Rassias, Gerasimos A.

, p. 22 - 28 (2007/10/03)

Heterobidentate sulfide-tertiary amine ligands incorporating 1,2-aminothioethers derived from ephedrine and pseudoephedrine have been prepared and used successfully in the palladium-catalysed asymmetric allylic substitution reaction, giving ees of up to 89 percent. The stereoelectronic effects operating in the reactions are discussed.

The Reductive Cleavage of Cyclic Aminol Ethers to N,N-Dialkylamino-derivatives: Modifications to the Eschweiler-Clarke Procedure

Page, Philip C. Bulman,Heaney, Harry,Rassias, Gerasimos A.,Reignier, Serge,Sampler, Edward P.,Talib, Salem

, p. 104 - 106 (2007/10/03)

The reductive cleavage of cyclic aminol ethers to give N-alkylamino-derivatives in very high yields can be achieved using chlorotrimethylsilane in the presence of sodium cyanoborohydride: in the case of cyclic aminol ethers derived from formaldehyde the Eschweiler-Clarke reaction can be carried out in formic acid heated under reflux in the absence of formaldehyde.

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